6656500 has 24 divisors (see below), whose sum is σ = 14538888. Its totient is φ = 2662400.

The previous prime is 6656497. The next prime is 6656527. The reversal of 6656500 is 56566.

It can be written as a sum of positive squares in 4 ways, for example, as 535824 + 6120676 = 732^2 + 2474^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6157 + ... + 7156.

It is an arithmetic number, because the mean of its divisors is an integer number (605787).

Almost surely, 2^6656500 is an apocalyptic number.

It is an amenable number.

6656500 is an abundant number, since it is smaller than the sum of its proper divisors (7882388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6656500 is a wasteful number, since it uses less digits than its factorization.

6656500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13332 (or 13320 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 6656500 is about 2580.0193797722. The cubic root of 6656500 is about 188.1114851054. Note that the first 3 decimals are identical.

The spelling of 6656500 in words is "six million, six hundred fifty-six thousand, five hundred".